You need to get its little evolded form of houndoom
You would have to trade a houndoom from colosseum or emerald.
Trade Colloseum or evolve Houndour (to get by trading Houndoom from Colloseum and breeding).
Yes you can trade leafgreen version Pokemon to another leafgreen version.
Only Pokemon colosseum can get a houndour although you actually get a houndoom just breed it to get houndour in leafgreen.
In Platinum version Houndoom learns Flamethrower at level 48. in diamond and pearl Houndoom also learns it at level 48.
there are 5 legendary Pokemon in leafgreen version
LeafGreen version does not have Growlithe.
its only available in Pokemon leafgreen version sorry
firered and leafgreen version
lavender town
You cannot catch aipom in leafgreen however you can in emerald or Pokemon colosseum.
yes you can trade pokemon leafgreen pokemon to pokemon emerald version same as pokemon fire.
Gligar is a flying and ground type of Pokemon. The only way to get this Pokemon in LeafGreen version is to trade for it.